Harman Kardon HKSUB 12, HKTS-12 Service manual
harman/kardon
HKSUB 12
Powered Subwoofer
SERVICE MANUAL
harman/kardon, Inc.
250 Crossways Park Dr.
Woodbury, New York 11797 Rev1 9/2004
HKSUB12 harman/kardon
CONTENTS
BASIC SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . ... . ... . . .. .. . .. . .. .. .. . . . . . 1
DETAILED SPECIFICATIONS . . . . . ………………... ……………. .. ………... . . .. . . . . .. . … . .2
CONTROLS & CONNECTIONS . . . . . . . . . . . . . .. . . . . . . . . … . . . . .. . . . . . . . . . .. . . .. . . . . 3
CONNECTION GUIDE………... . . . . . . . . . . . . .. . . . . . . . . …... . . . . . .. . . . . . . . . .. . . . . . . . . 5
CONFIGURING RECEIVER/PROCESSOR…………………..……………..……. . . . .. . .. . . . . . . 8
OPERATION……. . . . . .. . . . . . . . .. .. . . . .. .. . . . . …………………….……….. . . . .. . .. . . . . . . 9
BASIC TROUBLESHOOTING GUIDE………………………………………………………….. . . . .10
HKSUB 12 EXPLODED VIEW. . . . ………………... ……………. .. ………... . . .. . .. .. . . .. . … . 11
HKSUB 12 AMPLIFIER EXPLODED VIEW. . . . ………………... . .. ………... . . .. . .. .. . . .. . … . 12
HKSUB 12 BLOCK DIAGRAM . . . . . . . . . . . . . .. . . . . . . ……………… . . . . . . .. . .. .. . . . . . . 13
HKSUB 12 TEST PROCEDURE. .. . . . . . . . . . . . . . .. . . . . ……… ………….... . . . .. . .. .. . . . . . 14
HKSUB 12 PCB DRAWINGS. .. . . . . . . . . . . . . . .. . . . . ……… . …………. . . . . . . .. . .. .. . . . . . 15
HKSUB 12 ELECTRICAL PARTS LIST …………. .... . .. . . . . ………….…….. . . . . . .. . .. .. . . . . 17
HKSUB 12 MECHANICAL/PACKING PARTS LIST …………. .... . .. . . . . …... . . . . . .. . .. .. . . . . 20
HKSUB 12 IC – TRANSISTOR PINOUTS . … . . .. . . . . . . ………………….………... . .. .. . . . . . 21
HKSUB 12 SCHEMATIC DIAGRAMS . . . . . . . . .. .. .. .. . . . .. . ……………….……... . . . . . . . . . .22
HKSUB 12 PACKAGE………... . . . . . . . . . . . . .. . . . . . . . . …... . . . . . .. . . . . . . . . .. . . … . . . . .25
SPECIFICATIONS
Amplifier Power (RMS) 150 Watts
Driver 12" Polymer-coated-cone woofer
Inputs Stereo Line Level, dedicated Subwoofer (LFE)
and Speaker Level with gold-plated 5-way binding posts
Outputs Speaker Level with gold-plated 5-way binding posts
Low-Pass Frequency Continuously variable from 50Hz – 150Hz
Frequency Response 25Hz – low-pass crossover setting
Dimensions (H x W x D) 20-1/2" x 16" x 13-3/4"
(520mm x 401mm x 350mm)
Weight 40 lb/18kg
Occasional refinements may be made to existing products without notice but will always meet or exceed original specifications
unless otherwise stated.
1
r
2mV@50Hz into Line Input w/ 1 ch.
50mV@50Hz into Line Input w/ 1 ch
2
HKSUB12 harman/kardon
HK SUB12 150W Powered Amplifier
LINE VOLTAGE Yes/No Hi/Lo Line Unit Notes
Paramete
Amp Section
Type (Class AB, D, other) D D
Load Impedance (speaker) 4 Ohms
Rated Output Power 150 Watts
THD@ Rated Power 0.08 %
THD @ 1 Watt 0.15 %
DC Offset 5 mV-DC
Damping factor >100 DF
Input Sensitivity
Signal to Noise
SNR-A-Weighted 100 dBA
SNR-unweighted 90 dBr
SNR @ 1W-unweighted 65 dBr
Residual Noise Floor 1.2 mVrms
Residual Noise Floor 0.8
Input Impedance
Line input L&R , LFE (Sub) 10 K ohms
Filters
Left & Right Low Pass fixed 130 Hz -LFE Low Pass fixed 220 Hz -Subsonic filter (HPF) 22 Hz --
Limiter YES --
Features
LFE(Sub) Input YES
Volume pot Taper (lin/log) log -ATO YES
Signal Sensing (ATO)
ATO test Frequency 50 Hz
ATO Line Level 4.0 mV
ATO Speaker level input 40 mV
ATO Turn-on time 5 ms
US 120vac/60Hz Yes 108-132 Vrms
Specification Unit QA Test LimitsConditions Notes
Input Frequency 50 Hz
Line Input (L&R) 220 mVrms
LFE (Sub) Input 220 mVrms
Speaker/Hi Level Input 2.2 Vrms
mVrms(max)
Speaker/Hi Level Input 4.7 K ohms
n/a
n/a Nominal
150 1 input driven
1 22k filter
0.5 22k filter
30 @ Speaker Outputs
30
NA Nominal Freq. 1 input driven
±2dB To Rated Power 1 input driven
±2dB To Rated Power LFE input driven only
±2dB To Rated Power (-20 dB below Line In)...1 input driven
85 rel. to rated power A-Weighting filter
80 rel. to rated power 22k filter
60 rel. to 1W Output 22k filter
3.0
2.0
n/a Nominal
n/a Nominal
±2dB @ -3dB ref. 100Hz
±2dB @ -3dB ref. 100Hz
±2dB @ -3dB ref. 100Hz
n/a
functional BW Limited to 220 Hz
functional
functional
n/a
2.0 - 8.0
20 - 80
functional
Normal Operation
Volume @max, using RMS reading
DMM/VOM (or A/P)
Volume @max, w/ A/P Swept Bandpass
Measurement (Line freq.+ harmonics)
driven
driven
Amp connected and AC on, then input
signal applied
Measured at speaker terminals, Output
power 140 Watts THD 0.1 %
.
Auto Mute/ Turn-OFF Time 15 minutes
Power on Delay time 3 sec.
Transients/Pops
ATO Transient 5 mV-peak
Turn-on Transient 50 mV-peak
Turn-off Transient 50 mV-peak
Efficiency
Stand-by Input Power 10 Watts
Power Cons.@rated power 230 Watts
Protection
Short Circuit Protection YES --
Thermal Protection 65 deg. C -DC Offset Protection YES -Line Fuse Rating
US Version 3.15 Amps
10 - 25 T before muting, after signal is removed
functional AC Power Applied
10 @ Speaker Outputs
100 @ Speaker Outputs AC Line cycled from OFF to ON
100 @ Speaker Outputs AC Line cycled from ON to OFF
Maximum allowable input power under
nominal Input voltage and frequency, HOT
12 @ nom. line voltage
250 @ nom. line voltage
functional Direct short at output
functional @1/8 max unclipped Power
functional DC present at Speaker Out leads Relay or crowbar (for driver/fire protection)
Type-T or Slo Blo External fuse with UL/SEMKO rated holder
or COLD operation.
150 Watts @ 4 Ohms nominal line voltage
Temperature rise should not exceed 35K
rise
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HKSUB12 harman/kardon
AMPLIFIER PANEL CONTROLS AND CONNECTIONS
¢
LINE
LEVEL
∞
§
¶
•
¡ Speaker-Level Inputs
™ Speaker-Level Outputs
GREEN: ON
IN
SUB
L
R
NORMAL
PHASE
RED: STAND-BY
AUTO
REVERSE
ON
100Hz
50Hz
CROSSOVER
FREQUENCY
FILTER
OFF ON
150Hz
MIN
SUBWOOFER
LEVEL
MAX
£ Line-Level Full-Range Inputs
¢ Line-Level Subwoofer (SUB) Input
∞ Phase Switch
ª
‚
§ Music-Sense On/Off Switch
¶ LED Indicator
• High-Cut (Low-Pass) Filter Switch
ª Crossover Frequency Control
‚ Subwoofer Level Control
⁄ Master Power Switch
¤ AC Power Cord
£
LR
™
¡
IMPORTANT: CONNECT STRIPED WIRE TO RED ( ) SPEAKER TERMINAL.
HKSUB 12
Made in China
CA UT IO N
CA UT IO N
RISK O F ELECT RIC SHO CK
RISK O F ELECT RIC SHO CK
RISK O F ELECT RIC SHO CK
DO NOT O PEN
DO NOT O PEN
DO NOT O PEN
¡ Speaker-Level Inputs: If your receiver
or amplifier does not have a line-level
subwoofer output, connect these binding
post terminals to the main left and right
speaker terminals of your receiver or
amplifier. Remember to maintain polarity
by connecting the (+) terminal on the
receiver/amplifier to the (+) terminal on the
HKSUB 12
the receiver/
subwoofer, and the (–) terminal on
amplifier to the (–) terminal on the
HKSUB 12 subwoofer.
™ Speaker-Level Outputs: If you are
using the
Speaker-Level Inputs ¡ on
the HKSUB 12, connect these binding post
terminals to your front left and right speakers,
POWER
AC 120V~60Hz
250 Watts
remembering to maintain polarity by connecting the (+) terminal on the HKSUB 12
subwoofer to the (+) terminal on the speaker, and the (–) terminal on the HKSUB 12
subwoofer to the (–) terminal on the speaker. If you are not using the
Speaker-Level
Inputs ¡, connect your front left and
right speakers directly to your receiver
or amplifier. See pages 9 through 12 for
further information on speaker connections.
£ Line-Level Full-Range Inputs: Connect
the full-range, unfiltered line-level subwoofer
output or preamp output(s) of your receiver or
amplifier to these inputs. If your receiver does
not have a separate subwoofer output, use a
⁄
¤
Y-adapter (not supplied) to
preamp output to the main
channel, and connect the long end of the
adapter to the corresponding
on the HKSUB 12. If your receiver has only a
single subwoofer output, you may connect it
to either the left or right line-level input on the
HKSUB 12, and no Y-adapter is needed.
¢ Line-Level Subwoofer (SUB) Input:
Connect the filtered subwoofer output of a
receiver to this input. This input bypasses
the HKSUB 12’s internal crossover circuitry,
bridge the receiver’s
amp input for that
line-level input
2AMPLIFIER PANEL CONTROLS AND CONNECTIONS
AMPLIFIER PANEL CONTROLS AND CONNECTIONS 3
AMPLIFIER PANEL CONTROLS AND CONNECTIONS
and should only be used with a filtered signal. If your receiver does not have a filtered
subwoofer output, you should use the
Line-
Level Full-Range Inputs £ instead.
∞ Phase Switch: This switch determines
whether the HKSUB 12 subwoofer’s pistonlike action moves in and out in phase with
the main speakers. If the speakers are out
of phase, the sound waves produced by
the subwoofer will be cancelled out, reducing bass response. This phenomenon
depends in part on the relative placement
of the speakers in the room. In most cases,
the
Phase Switch ∞ should be left in the
NORMAL position. However, it does no
harm to experiment with the Phase
Switch ∞, and you may leave it in the
position that maximizes bass response.
§ Music-Sense On/Off Switch: When
this switch is placed in the AUTO position,
and when the Master Power Switch ⁄ is
turned on, the HKSUB 12 will automatically
turn on or place itself in the Standby mode,
depending on whether it is receiving an audio
signal. When this switch is placed in the
ON
position, the HKSUB 12 will remain on,
whether or not it is receiving an audio signal.
¶ LED Indicator: This LED indicates
whether the HKSUB 12 is in the ON
or STANDBY state when used with
the Music-Sense On/Off Switch § in
the AUTO position. The LED is lit green
to indicate that the HKSUB 12 is receiving
an audio signal and is turned on, and the
LED is lit red to indicate that no signal is
being received and the HKSUB 12 is in
Standby mode.
When the
Music-Sense On/Off Switch
§ is in the ON position, the LED will be
lit green, whether or not an audio signal
is present.
When the
Master Power Switch ⁄ is
turned off, the LED goes dark, no matter
which position the Music-Sense On/Off
Switch § is in.
• High-Cut (Low-Pass) Filter Switch:
Placing this switch in the ON position activates circuitry that filters out all audio input
signals above the setting of the
Crossover
Frequency Control ª. This allows the
HKSUB 12 to focus its power on reproducing the low-frequency portion of the signal,
avoiding inefficiency and distortion. Engage
this filter when using the
Speaker-Level
Inputs ¡, or when using the Line-Level
Full-Range Inputs £, unless your receiv-
er or processor processes its line-level output using a low-pass filter. The filter has no
effect when the
SUB Input ¢ is used.
ª
Crossover Frequency Control: Adjust
this control to set the highest frequency the
HKSUB 12 will reproduce. You should
begin by setting it slightly above the
lowest frequency that your main speakers
are capable of reproducing. You may
safely adjust the crossover frequency
later as you listen to different program
materials. This control will have no effect if
you are using the
Line-Level Subwoofer
(SUB) Input ¢, or if you have set the
High-Cut (Low-Pass) Filter Switch •
to the OFF position. See page 14 for
more information on adjusting the
crossover setting.
‚ Subwoofer-Level Control: Volume
may be adjusted using the Subwoofer-
Level Control.Turn the control clockwise
to increase the HKSUB 12’s volume, or
counterclockwise to decrease it.
⁄ Master Power Switch: Press this
rocker switch at the “•” mark to power-on
the HKSUB 12 subwoofer. The HKSUB 12
will then be either in the Standby mode or
completely on, depending on the position
of the
Music-Sense On/Off Switch §.
¤ AC Power Cord: Plug this cord
into an active, unswitched electrical outlet
for proper operation of the HKSUB 12.
The cord should not be plugged into the
accessory outlets found on some audio
components.
4
HKSUB12 harman/kardon
5
HKSUB12 harman/kardon
SPEAKER CONNECTION GUIDE
Analog Receiver/Processor –
Speaker-Level Connections
Use this installation method for
analog receivers or processors
that do not have
or bass-management programming,
and where the receiver/
does not have a subwoofer output,
or a volume-controlled preamp
(line-) level output:
Connect your receiver or amplifier’s front
left and right speaker terminals to the
left and right Speaker-Level Input ¡
terminals on the HKSUB 12 subwoofer
that are marked “High Level In.” Connect
the left and right Speaker-Level Output
™ terminals on the HKSUB 12 subwoofer
that are marked “High Level Out” to the
corresponding terminals on
your front left and right speakers.
Connect your receiver or amplifier’s
center, surround, and surround back
speaker terminals to the corresponding
terminals on the back of your center
and surround speakers.
When all connections have been made,
plug the
AC Power Cord ¤ on the
subwoofer into an AC outlet.
digital processing
processor
the back of
Front
Left
– + – +
Front Left
Surround Left
Surround
Left
Subwoofer
or Amplifier
Surround
Back Left
Center
– +
HKSUB 12
Receiver
Center
RL
Surround
Back Right
Front Right
Surround Right
Front
Right
Surround
Right
– + – +
Surround
Back Left
4 SPEAKER CONNECTION GUIDE
Surround
Back Right
6
HKSUB12 harman/kardon
SPEAKER CONNECTION GUIDE
Analog Receiver/Processor –
Line-Level Connections
Use this installation method for
analog receivers or processors
that do not have
or bass-management programming,
and where the receiver/
equipped with an unfiltered subwoofer
output, or a volume-controlled preamp
(line-) level output:
Use the supplied RCA-type patch cord to
connect the
your receiver
right Line-Level Full-Range Input £ on
the HKSUB 12 subwoofer. Use both the left
and right inputs on the subwoofer if your
receiver or processor has both left and right
line-level outputs. (You will need to purchase
a second 15-foot interconnect cable.)
If your receiver is equipped with line-level outputs but does not have a separate subwoofer
output, use a Y-adapter (not supplied) to
bridge the receiver’s preamp output to the
main amp input for that channel, and connect
the long end of the adapter to the corresponding line-level input on the HKSUB 12.
IMPORTANT: Do not use the SUB Input
¢ on the subwoofer with analog receivers
or processors that have a full-range subwoofer output, such as models that have
Dolby Pro Logic* surround processing,
but not Dolby Digital processing. However,
if your analog receiver or processor has
a filtered subwoofer output, such as some
®
THX
-certified models, you may connect
it to the SUB Input ¢.
receiver’s
for more information.
Make sure that you have configured
your surround sound processor
for “Subwoofer On.”
digital processing
processor is
line-level subwoofer output on
or amplifier to either the left or
Consult your
or processor’s owner’s manual
When all connections have been made, plug
the AC Power Cord ¤ on the subwoofer
into an AC outlet.
Connect each speaker to the corresponding
speaker terminals on your receiver or amplifier.
Front
Left
– +
Front
Left
Surround
Left
Surround
Left
Surround
Back Left
Receiver or Amplifier
Surround
Back Left
– +
Center
– +
HKSUB 12
Subwoofer
Line-Level
Subwoofer
Out
Center
Surround
Back Right
Surround
Back Right
Front
Right
– +
L
R
Front
Right
Surround
Right
Surround
Right
– +
Connection to Digital
Receiver/Processor
Use this installation method for
analog receivers or processors
that have Dolby Digital, DTS or
other digital surround decoders and
bass-management programming,
or analog receivers or
processors
that have a filtered subwoofer output:
Use the line-level input jack marked
SUB ¢ for the Low-Frequency Effects
channel. Connect this jack to the
subwoofer output or LFE output on your
receiver or amplifier. Connect each speaker
to the corresponding speaker terminals on
your receiver or amplifier.
Make sure you’ve configured your surround
sound processor for “Subwoofer On.”
When all connections have been made,
plug the
AC Power Cord ¤ on the
subwoofer into an AC outlet.
SPEAKER CONNECTION GUIDE
7
HKSUB12 harman/kardon
Front
Left
– +
Surround
Left
– +
Front
Left
Surround
Left
Center
– +
HKSUB 12 Subwoofer
SUB
LINE
LEVEL
IN
SUB/LFE
Surround
Back Left
– + – +
Receiver
Amplifier
R
L
Out
Center
Surround
Back Right
or
Front
Right
– +
Front
Right
Surround
Right
Surround
Right
– +
– + – +
Surround
Back Left
Surround
Back Right
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